Dreams and visions just seem to play themselves out in the world without having to say anything or tell anyone so far.

If I am shown foreknowledge and I am commanded to tell it, I will do so.

Daniel 11

32 Those who act wickedly against the covenant he will corrupt with his blandishments, but the people who know their God will stand firm and prevail. 33Those among the people who have discernment will cause the rest of the people to understand what is happening; nevertheless, for a while they will fall victim to sword, fire, exile and pillage. 34 When they stumble, they will receive a little help, although many who join them will be insincere. 35 Even some of those with discernment will stumble, so that some of them will be refined, purified and cleansed for an end yet to come at the designated time. 36 "The king will do as he pleases. He will exalt himself and consider himself greater than any god, and he will utter monstrous blasphemies against the God of gods. He will prosper only until the period of wrath is over, for what has been determined must take place. 37 He will show no respect for the gods his ancestors worshipped, or for the god women worship - he won't show respect for any god, because he will consider himself greater than all of them. 38 But instead, he will honor the god of strongholds; with gold, silver, precious stones and other costly things he will honor a god unknown to his ancestors. 39 He will deal with the strongest fortresses with the help of a foreign god. He will confer honor on those he acknowledges, causing them to rule over many and distributing land as a reward. 40 "When the time for the end comes, the king of the south will push at him; while the king of the north will attack him like a whirlwind, with chariots, cavalry and a large navy. He will invade countries, overrun them and move on. 41 He will also enter the Land of Glory, and many [countries] will come to grief, but these will be saved from his power - Edom, Mo'av and the people of 'Amon. 42 He will reach out his hand to seize other countries too. The land of Egypt will not escape - 43 he will control the treasures of gold and silver, as well as everything else in Egypt of value. Put and Ethiopia will be subject to him. 44 However, news from the east and north will frighten him, so that he moves out in great fury to ruin and completely do away with many. 45 Finally, when he pitches the tents of his palace between the seas and the mountain of the holy Glory, he will come to his end, with no one to help him.

As Christ the living Word is truth, so his written word is truth. Though heaven and earth will pass away, God’s truth never will.